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lua: implement iterator with installed packages

cute-signatures
Natanael Copa 2011-02-21 14:35:00 +00:00
parent 9e60a72b92
commit 391cd01b41
1 changed files with 43 additions and 5 deletions
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48
src/lua-apk.c
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@ -9,7 +9,8 @@
#include "apk_version.h" #include "apk_version.h"
#define LIBNAME "apk" #define LIBNAME "apk"
#define APKDB_META "apk_database" #define APK_DB_META "apk_database"
#define APK_IPKG_META "apk_installed_package"
struct flagmap { struct flagmap {
const char *name; const char *name;
@ -134,9 +135,9 @@ static struct apk_database *checkdb(lua_State *L, int index)
{ {
struct apk_database *db; struct apk_database *db;
luaL_checktype(L, index, LUA_TUSERDATA); luaL_checktype(L, index, LUA_TUSERDATA);
db = (struct apk_database *) luaL_checkudata(L, index, APKDB_META); db = (struct apk_database *) luaL_checkudata(L, index, APK_DB_META);
if (db == NULL) if (db == NULL)
luaL_typerror(L, index, APKDB_META); luaL_typerror(L, index, APK_DB_META);
return db; return db;
} }
@ -155,7 +156,7 @@ static int Papk_db_open(lua_State *L)
opts.open_flags |= APK_OPENF_READ; opts.open_flags |= APK_OPENF_READ;
db = lua_newuserdata(L, sizeof(struct apk_database)); db = lua_newuserdata(L, sizeof(struct apk_database));
luaL_getmetatable(L, APKDB_META); luaL_getmetatable(L, APK_DB_META);
lua_setmetatable(L, -2); lua_setmetatable(L, -2);
r = apk_db_open(db, &opts); r = apk_db_open(db, &opts);
@ -227,6 +228,42 @@ ret_nil:
return 1; return 1;
} }
// Iterator of all installed packages
struct apk_installed_package_iterator {
struct list_head *end;
struct apk_installed_package *node;
};
static int iterate_installed(lua_State *L)
{
struct apk_installed_package_iterator *i;
struct apk_installed_package *ipkg;
i = (struct apk_installed_package_iterator *)lua_touserdata(L, lua_upvalueindex(1));
ipkg = i->node;
if (&ipkg->installed_pkgs_list == i->end)
return 0;
i->node = list_entry(ipkg->installed_pkgs_list.next,
typeof(*ipkg), installed_pkgs_list);
return push_package(L, ipkg->pkg);
}
static int Pinstalled(lua_State *L)
{
struct apk_database *db = checkdb(L, 1);
struct apk_installed_package_iterator *i;
i = (struct apk_installed_package_iterator *) lua_newuserdata(L, sizeof(*i));
i->end = &db->installed.packages;
i->node = list_entry((&db->installed.packages)->next,
struct apk_installed_package,
installed_pkgs_list);
lua_pushcclosure(L, iterate_installed, 1);
return 1;
}
static const luaL_reg reg_apk_methods[] = { static const luaL_reg reg_apk_methods[] = {
{"version_validate", Pversion_validate}, {"version_validate", Pversion_validate},
{"version_compare", Pversion_compare}, {"version_compare", Pversion_compare},
@ -235,6 +272,7 @@ static const luaL_reg reg_apk_methods[] = {
{"who_owns", Papk_who_owns}, {"who_owns", Papk_who_owns},
{"exists", Papk_exists}, {"exists", Papk_exists},
{"is_installed", Papk_exists}, {"is_installed", Papk_exists},
{"installed", Pinstalled},
{NULL, NULL} {NULL, NULL}
}; };
@ -250,7 +288,7 @@ LUALIB_API int luaopen_apk(lua_State *L)
lua_pushliteral(L, APK_VERSION); lua_pushliteral(L, APK_VERSION);
lua_settable(L, -3); lua_settable(L, -3);
luaL_newmetatable(L, APKDB_META); luaL_newmetatable(L, APK_DB_META);
luaL_register(L, NULL, reg_apk_db_meta_methods); luaL_register(L, NULL, reg_apk_db_meta_methods);
lua_pushliteral(L, "__index"); lua_pushliteral(L, "__index");
lua_pushvalue(L, -3); lua_pushvalue(L, -3);